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**Quick** Three Guys go into a motel, they buy a room. The clerk charges them $30. However, the clerk realizes that the room only costs $25 and gives $5 to the bell boy to give back to them. Since $5 can't be split evenly, the bell boy gives each man $1 and keeps $2 for himself.

In other words:

They each payed $10 dollars, so $\displaystyle $10 \cdot 3 = $30 $

They each got $1 back, so $\displaystyle (10-1) \cdot 3 = 27 $

and the bellboy keeps $2, $\displaystyle 9 \cdot 3 + 2 = 29 $

Now the question: What happened to the extra dollar?

Here is a riddle that I like and it stumps a lot of people, let's see how you guys do.